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Forked from nRewik/UILabel+FontSize.Swift
Created February 26, 2016 06:48
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iOS-Swift adjust font size to fit in rect
//
// UILabel+FontSize.Swift
//
// Created by Nutchaphon Rewik on 7/11/15.
// Copyright (c) 2015 Nutchaphon Rewik. All rights reserved.
//
import UIKit
extension UILabel{
func adjustFontSizeToFitRect(rect : CGRect){
if text == nil{
return
}
frame = rect
var maxFontSize: CGFloat = 100.0
let minFontSize: CGFloat = 5.0
var q = Int(maxFontSize)
var p = Int(minFontSize)
let constraintSize = CGSize(width: rect.width, height: CGFloat.max)
while(p <= q){
let currentSize = (p + q) / 2
font = font.fontWithSize( CGFloat(currentSize) )
let text = NSAttributedString(string: self.text!, attributes: [NSFontAttributeName:font])
let textRect = text.boundingRectWithSize(constraintSize, options: .UsesLineFragmentOrigin, context: nil)
let labelSize = textRect.size
if labelSize.height < frame.height &&
labelSize.height >= frame.height-10 &&
labelSize.width < frame.width &&
labelSize.width >= frame.width-10 {
break
}else if labelSize.height > frame.height || labelSize.width > frame.width{
q = currentSize - 1
}else{
p = currentSize + 1
}
}
}
}
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